Electric razor



Aug. 14, 1951 o, sMlTH I 2,564,379

ELECTRIC RAZOR Filed May 7, 1947 27 24 INVENTOR.

Waa71 0, J'm/i fi Patented Aug. 14, 1951 ELECTRIC RAZOR Ralph O. Smith,Minneapolis, Minn.

Application May 7, 1947, Serial No. 746,528

4 Claims.

My present invention relates to improvements in electric razors and,more particularly, to the rotary cutter type.

The object of this invention is to provide an extremely simple andhighly efficient electric razor having relatively few parts and in whichthe cutting parts thereof are readily removable and replaceable for thepurpose of cleansing or the substitution of new parts for dull partsf Tothe above end, the invention consists of the novel devices andcombination of devices hereinafter described and defined in the claims.

In the accompanying drawing, which illustrates the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawing:

Fig. l is a top plan view of the improved razor;

Fig. 2 is a side elevational View of the razor with a portion of itshandle broken away;

Fig. 3 is a bottom plan view of the razor as shown in Fig. 2;

Fig. 4 is a view partly in elevation and partly.

in longitudinal central section taken on the line 4--4 of Fig. 1;

Fig. 5 is a view partly in end elevation and partly in section taken onthe line 55 of Fig. 4, on an enlarged scale;

Figs. 6 and 7 are sectional views taken on the lines 6-6 and 7-1 of Fig.4, respectively, on the same scale as Fig. 5;

Fig. 8 is an elevational view of the cutter removed from the razor;

Fig. 9 is an end elevation of the blade; and

Fig. 10 is a fragmentary detail view of the cutter and blade inoperative relation.

This electric razor has a cylindrical handle II having therein acylindrical motor compartment that extends through the outer end of saidhandle to afford access thereto. The open outer end of the handle II isnormally closed by a cap I2 attached thereto by a screw-thread I 3. Theinner end portion I4 of the handle I I is contracted and has therein anaxial bore I5 that leads from the motor compartment.

, A tubular shank I6 extends completely through the bore I5 and issnugly fitted therein. Within the motor compartment is a rectangularmotor frame I! having a collar I8 on its inner end and into which theadjacent end portion of the shank I6 is telescoped and detachablysecured thereto by a screw I9. An electric motor is mounted in the frameIT by means of bearings 29. The motor frame I! and the motor 29, attheir outer end portions, are detachably secured to the handle II byscrews 2|. Circuit wires 22 for the mospiral cutting edges 26 on acylindrical body 21. These cutting edges 26 are formed by a square.screw-thread. On the ends of the cutter body 21 is a pair of trunnions28 journaled in front and rear cylindrical bearings 29 and 39,respectively.v The front bearing 29 is mounted in the outerend portionof the blade support 23 and detachably secured thereto by a screw 3|.The diameter of the bearing 29 is slightly less than the internaldiameter of the blade support 23 and to bring the same into axialalignment with the shank I6, 2. semi-cylindrical shim 32 is interposedbetween the blade support 23 and the bearing 29;

and held by the screw 3|. The rear bearing 30 is tightly fitted in theouter end portion of the shank I6 and has an extension 34 of reduceddiameter, that extends into the blade support 23-.

The bearing 29 and the bearing extension 34, support the blade 24, inpart, at its end portions. This blade 24 is further supported byoutturned flanges 35, on its longitudinal edges, that slidably rest onthe longitudinal edges of the blade support 23. The blade 24 has thereina multiplicity of edgewise spaced hair passageways or slots 36 thatextend transversely of said blade. Both longitudinal edge portions ofthe blade 24, at each slot 36, are ground to sharp shearing edges 31.The rotary cutter 25 is endwise reversible and supported with its spiralcutting edges 26 in close cutting action with the shearing edges 31.

A keeper 38 is provided for removably holding the blade 24 with itsflanges 35 slidably resting on the blade support 23. The keeper 38 issemicylindrical, nested on the blade support 23 and is detachablysecured thereto by the screw 3| and screws 39. On the longitudinal edgesof the keeper 38 are inturned flanges 49 that overlie the blade flanges35. The upper edge of the blade support 23 and the overlying keeperflanges 49 form therebetween a pair of opposing channels in which theblade flanges 35 are slidably held. This mounting of the blade 24permits ready endwise removal of the same from its support 23 by slidingmovement. The keeper 38 and its flanges 40 are spring metal and have aslight downward pull on the flanges 35 that frictionally holds saidblade in position on the support 23.

The cutter 25 is rotated directly from the motor 20 by its armatureshaft 4| which extend axially through the shank l6 and is journaled inthe bearing 30. On the outer end of the shaft 4| is a bit 42 thatextends into one of the slots 43 in the trunnions 28, depending on whichway the cutter 25 is endwise turned. Obviously, the bit 42 and eitherone of the trunnions 28 and the slot 43 therein afford a separablecoupling by which the rotary cutter 25 may be detached from the haft 4|by endwise movement. To remove the rotary cutter 25 from the razor, itis only necessary to remove the bearing 29 and draw said cutteroutwardly.

The entire razor assembly may be removed from the handle I I simply byremoving the keeper 38 and pulling said assembly from the handle throughthe open end thereof.

From what has been said, it will be understood that the electric razordescribed is capable of modifications as to details of construction andarrangement within the scope of the invention herein disclosed andclaimed.

What I claimis:

I. A handle having in one end portion a 002m partment, an axial bore inits other end portion, a frame in the compartment having a cylindricalshank extending outwardly through the bore and also having a stopshoulder engaging the handle at the bore, an electric motor in the framewith its'a'rmature shaft through the shank, said shank having on itsouter end a support that forms an extension thereof and is semi-circularin crosssection, a semi-circular blade loosely resting on the support,said support and the blade forming a complete cylindrical housing, meansreleasably securing the blade to the support, the internal diameter ofthe blade being slightly less than the internal diameter of the support,a cylindrical cutter in the housing connected to the armature shaft'andcooperating with the blade, and a bearing in each end of the housing inwhich the cutter is journaled.

2. The structure defined in claim 1, further including a substantiallysemi-circular shim. interposed between the outer bearing and thesupport.

3. The structure defined in claim 1 in which the means releasablysecuring the blade to the support includes out-turned flanges on thelongitudinal edges of the blade and a substantially semi-cylindricalkeeper in which the shank and the support are fitted, said keeper havinginturned flanges overlapping the flanges on the blade, said keeperengaging the handle as a stop, and means releasably securing the keeperto the shank and the support, said frame, shank, motor, armature shaft,support, blade and cutter afiording a self-contained unit that isremovable through the handle when the keeper is removed.

4. A handle having in one end portion a compartment, an axial bore inits other end portion, a frame in the compartment having a tubular shankextending outwardly through the bore, an electric motor in the framewith its armature shaft extending through the shank, cutting mechanismon the free end portion of the shank including a cutter attached to saidshaft, and a displaceable keeper on' the shank engagingthe respectiveend of the handle, said frame, shank, motor and cutting mechanism,affording a selfcontained unit, removable from the handle through itsopposite end from the bore when the keeper is removed from the shank.

RALPH 0. SMITH.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Great Britain Dec. 20, 1944

